Fingerprint Classification- Loop Patterns
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Fingerprint Classification- Loop Patterns

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Fingerprint Classification- Loop Patterns Fingerprint Classification- Loop Patterns Presentation Transcript

  • FBI MISSION STATEMENT
    The mission of the FBI is to protect
    and defend the United States
    against terrorist and foreign
    intelligence threats, to uphold and
    enforce the criminal laws of the
    United States, and to provide
    leadership and criminal justice
    services to federal, state,
    municipal, and international
    agencies and partners.
  • CJIS MISSION STATEMENT
    Reduce terrorist and criminal activities
    by maximizing the ability to provide
    timely and relevant criminal justice
    information to the FBI and to qualified
    law enforcement, criminal justice,
    civilian, academic, employment, and
    licensing agencies concerning
    individuals, stolen property, criminal
    organizations and activities, and other
    law enforcement related data.
  • CJIS DIVISION
  • ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------FINGERPRINT PATTERN RECOGNITION----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  • Federal Bureau of Investigation
    United States Department of Justice
    Illustrations of Various Fingerprint Patterns
    The presence or existence of whorls in finger impressions
    is used as the basis for the determination of the chief or the primary classification.
    Each whorl appearing in an or all of the ten fingers has a certain arbitrary or fixed value. The addition of the values represented by such whorls and the indication of the total value is known as the primary classification.
    Illustrations of the whorl types which are shown on the right of this chart. Illustrations of the other types are shown on the left.
    PLAIN ARCH
    PLAIN WHORL
    TENTED ARCH
    CENTRAL POCKET
    RADIAL LOOP
    DOUBLE LOOP
    ULNAR LOOP
    ACCIDENTAL
  • FINGERPRINT PATTERN FREQUENCY
  • LOOP
    Definition: A LOOP is that type of pattern in which one or more ridges enter upon either side, recurve, touch or pass an imaginary line between delta and core and pass out or tend to pass out upon the same side the ridge entered.
  • FLOW OF RIDGES
    ULNAR LOOP ULNAR LOOP RADIAL LOOP
    THE ABOVE PATTERNS SHOW THE DIRECTION RIDGES FLOW IF LOCATED IN THE RIGHT HAND.
  • FLOW OF RIDGES
    RADIAL LOOP ULNAR LOOP RADIAL LOOP
    THE ABOVE PATTERNS SHOW THE DIRECTION RIDGES FLOW IF LOCATED IN THE RIGHT HAND.
  • THREE BASIC REQUIREMENTS OF A LOOP
    1. Sufficient Recurve
    2. Delta
    3. Ridge Count - Across a looping ridge
    CORE
    SUFFICIENT
    RECURVE
    DELTA
    3 COUNT LOOP
  • SUFFICIENT RECURVE
    S
    S
    S
    S
    4.
    5.
    2.
    3.
    1.
    S
    S
    S
    S
    S
    S
    Shoulders
    6.
    S
    S
    8.
    7.
    S
    S
    S
    S
    A SUFFICIENT RECURVE consists of the space between the
    shoulders of a loop free of any appendages which abut
    upon it at a right angle on the outside of the recurve.
  • SUFFICIENT RECURVE
    9.
    10.
    11.
    S
    S
    S
    S
    S
    S
    THE SHOULDERS OF A LOOP are the points at which the recurving ridge definitely turns inward or curves.
  • APPENDAGE
    Attachment or Connection
    An appendage striking the outside of the recurve
    at a right angle will spoil that recurve.
  • LOOP PATTERN AREA
    T
    PATTERN
    AREA
    T
    PATTERN AREA includes the CORE, DELTA, and RIDGES which are used in the classification of a loop.
  • TYPELINES
    T
    T
    T
    T
  • TYPELINES
    T
    T
    T
    T
    Definition: The two innermost ridges that are parallel and surround or tend to surround the pattern area.
  • DELTA
    THE DELTA IS THAT POINT ON A RIDGE AT OR NEAREST THE POINT OF DIVERGENCE OF TWO TYPELINES, AND LOCATED AT OR DIRECTLY IN FRONT OF THE POINT OF DIVERGENCE.
    Area to be considered in front of the point of divergence of two typelines.
  • DELTAS
    DOT
    MEETING
    OF TWO
    RIDGES
    BIFURCATION
    SHORT
    RIDGE
    ENDING
    RIDGE
    RECURVING
    RIDGE
  • CORE
    CORE
    CORE
    CORE
    CORE
    THE APPROXIMATE CENTER OF THE PATTERN
    PLACED UPON OR WITHIN THE INNERMOST SUFFICIENT RECURVE.
    LOCATED ON THE SHOULDERS OF THE INNERMOST LOOP FARTHEST FROM THE DELTA.
  • CORE
    CORE
    CORE
    CORE
    CORE
    LOCATED ON THE SPIKE OR ROD IN THE CENTER OF THE INNERMOST RECURVE, PROVIDED THE SPIKE OR ROD RISES AS HIGH AS THE SHOULDERS.
  • RIDGE COUNTING
    1 - Count 2 - Counts 3 - Counts
    1 1 2 2
    1 2 2 2 2 1
  • RIDGE COUNTING
    C
    04
    D
    04 - COUNTS
  • RIDGE COUNTING
    C
    02
    D
    02 - COUNTS
  • RIDGE COUNTING
    C
    D
    17 - COUNTS
  • 03
    02
    03
    C
    C
    C
    D
    D
    D
    D
    02
    03
    01
    C
    C
    C
    D
    D
    D
  • 04
    02
    01
    C
    C
    C
    D
    D
    D
    01
    02
    03
    C
    C
    C
    D
    D
    D
  • 02
    01
    02
    C
    C
    C
    D
    D
    D
    01
    TT
    01
    C
    C
    C
    D
    D
    D
  • LOOP
    C
    D
    12 COUNTS
  • LOOP
    C
    D
    06 COUNTS
  • LOOP
    C
    D
    02 COUNTS
  • LOOP
    C
    D
    07 COUNTS
  • LOOP
    C
    D
    16 COUNTS
  • LOOP
    C
    D
    23 COUNTS
  • LOOP
    C
    D
    14 COUNTS
  • LOOP
    C
    D
    02 COUNTS
  • LOOP
    C
    D
    13 COUNTS
  • LOOP
    C
    D
    10 COUNTS
  • LOOP
    C
    D
    17 COUNTS
  • LOOP
    C
    D
    10 COUNTS
  • LOOP
    C
    D
    15 COUNTS
  • LOOP
    C
    D
    14 COUNTS
  • LOOP
    C
    D
    05 COUNTS
  • LOOP
    C
    D
    15 COUNTS
  • LOOP
    C
    D
    22 COUNTS
  • LOOP
    C
    D
    03 COUNTS
  • LOOP
    C
    D
    14 COUNTS
  • LOOP
    C
    D
    10 COUNTS
    Join the two loops as one.
  • ULNAR LOOP
    Ulnar Loops flow toward the little finger.
    02
    03
    03
    01
    03
    03
    02
    03
    02
    03
    The direction of flow applies to the finger on the hand, not as they appear on the fingerprint card.
  • RADIAL LOOP
    Radial Loops flow toward the thumb.
    03
    52
    53
    03
    01
    55
    01
    01
    01
    53
    The direction of flow applies to the fingers on the hand, not as they appear on the fingerprint card.
  • NOTE:
    When a loop enters and exits from the THUMB side of the hand, the pattern will always be a “Radial Loop.”
    When a loop enters and exits from the PINKY finger, the pattern will always be an “Ulnar Loop.” There are NO exceptions to this rule!
    RIGHT HAND
    ULNA
    RADIUS
  • LOOP FREQUENCY
  • Questions?